Brickmaking-machine.



F. R. STEHM. BRICKMAKING MACHINE.

APPLICATION FILED JUNE I5, I9I4.

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F. R. STEHM.

BRICKMAKING MACHINE.

APPLICATION FILED IuNE I5, 1914-.

Patented Oct. 1, 1918.

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BRICKMAKING MACHINE.

APPLICATION FILED 1uNE15. i914.

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F. R. STEHM.

BRICKMAKING MACHINE.

APPLICATION F|LED1uNE|5.191-z.

Paf-umd oet. 1, 1918.

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Patented Oct. 1, 1918.

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BRICKNIAKING MACHINE.

APPLICATION FILED JUNE I5. l9l4. 1,280,575. Patented 0t.1,1918.

18 SHEETS-SHEET J.

F. R. STEHM.

BRICKMAKING MACHINE.

APPLICATION FILED JUNE I5, I9l4.

l Patented Oct. 1, 1918.

weg/W F. R. STEHM.

BRICKMAKING MACHINE. APPLICAHON HLED1uNE15.1914.

Patented Oct. 1, 1918.

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F. R. STEHM.

BRICKIVIAKING MACHINE. K

Patented Oct. I, 1918.

APPLICATION FILED ,IUNE I5. I9I4.

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WIIIIIIILII'I F. R. STEHIVI.

BRICKMAKING MACHINE.

APPLICATION FILED JUNI-215. 1914.

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BRICKMAKING MACHINE.

APPLICATION FILED JUNE 15, 1914.

Patented Oct. 1, 1918.

18 SHEETS-SHEET 12 LR. STEHM.

I BRICKIVIAKING MACHINE.

APPLICATION FILED JUNE I5. 1914.

F. R. STEHV.

BHICKMAKINQ MACHINE. APPLlCATlON FILED JUNE l5. 1914. 1,280,575. Patented Oct. 1, 1918.

18 SHEETS-SHEET I4.

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BRICKMAKINGMACHINE,

APPLICATION FILED JUNE I5. I9I4.

1,2899575, Patented OCI. 1,1918.

18 SHEETS-SHEET l5.

F. R. STEHVI.

BHICKMAKING MACHINE.

APPLICATION FILED luNE l5. 1914.

Patented Oct. 1, 1918.

18 SHEETS-SHEET 16- F. R. STEHM.

BRICKMAKING MACHINE.

APPLICATION FILED JUNE l5.- 1914. 1,280,575. Patented 061.11918.

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FRANK R. S'IEHM, 0F DES MOINES, IOWA, ASSIGNOR TOTHE ENAMEL CONCRETE COM- PANY, OF DES MOINES, IOWA, ,A CORPORATION OF SOUTH DAKOTA.

BRICKMAKING-MACHIN E.

Specification of Letters Patent.

Patented Oct. 1, 1918.

Application filed .Tune 15, 1914. Serial No. 845,109.

To all whom t may concern.'

Be it known that I, FRANK R. STEHM, a citizen of the United States, residin at Des Moines, in the county of Polk and tate of Iowa, have .invented new and useful Improvements in Brickmaking- Machines, of which the following is a specification. y

This inventionl relates to an automatic brick making machine and more specifically to a machine for making concrete brick.

It is an object of my invention to manufacture compressed concrete brick or other similar products having at least one'face of a predetermined texture and color. In the embodiment of my invention herein disclosed, the finished face is smooth, non-adhesive and water-proof, whereby the finished brick is non-absorbent on its exposed side,

aseptic and may be washed whenever desired or, if exposed, is washed down from time Ito time by the rain.

Another object of my invention is to p-rovide a means whereby mold parts may be automatically assembled upon a pallet w/hich forms the bottoms of the molds andfhas a finished surface of the desired texture and again automatically disassembled therefrom at the delivery end of the machine in order to allow the removal of the pallet with the finished brick upon it, without disturbing the contact between the two. n

A further object of my invention is to discharge into the molds when so assembled, a liquid or semi-liquid layer preferably consisting of powdered cement mixed with fine sand, with water enough added to make a readily flowing mixture which will spread out, intimately associate itself with the polished non-adhesive surface of the pallets forming the bottoms of the molds and thus assume the surface of the latter when dry. The liquid layer may be colored if desired or may be thenatural color of the finely ground material of which it is composed. I term the liquid layer an enameling layer or an enameled layer because it imparts to the brick a surface having all the advantages of an enamel coating.

It is another object of my invention to superimpose upon and unite with this liquid or semi-liquid layer, the layer or layers of concrete comprising the remainder of the brick.

It is another object of my invention to interpose in the manufacture of the brick, be-

body of the brick, what I have termed a cushioning layer, or a layer preferably formed of the same material as the liquid layer but in dry or in plastic form. This cushioning layer tant and new functions. Its most important function is to shield the liquid layer from the impact ofthe brick making material when the latter is dropped into the mold and thus vto prevent the splashing of the liquid layer or its bein sloshedso as to be thinner in the'finished rick in some places than in others. Next the cushioning layer which preferably consists of material the same as that of the liquid layer but drier becomes intimately mixed with the latter, absorbs its excess moisture whilestill not disturbing the intimate contact between the bottom of the liquidflayerand the face of the pallet due to the fluidity of the liquid. Its third function is to form a supplementary backing for the liquid layer, thus making up 1the required thickness of surfacing materia It is another object of my invention to remove the wet formed brick and the polished non-adhesive surfaceA on which it was formed, together, without breaking the contact between the two and thus to permit the brick to be dried in contact with and resting erforms several impor# upon the said polished non-adhesive surface of the mass of the brick, the gradual settling y of excess liquid in the brick will make an excess of liquid at the finished face, which in combination with the leisurely drying will result in perfect crystallization of all of the concrete adjacent the surface of the pallet and the finished surface of the brick will assume a hard glossy and polished texture with exact fidelity to that of the surface upon which it was formed and dried.

From the foregoing it will be seen that my invention contemplates three individual feeds; first the liquid feed of finely divided material', second the cushion feed, )referably of the same material, but dryer, third the feed of the material forming the body of the brick. The charges thus introduced into the molds are thereafter strongly compressed,

@t clutch mechan the sides of the mold sections raised while the brick is held upon the pallet and finally the pallet and the brick thereon are removed and its associated mechanism.`

Fig. 4 is a detail view of the cushion feed. Fig. 5 is a partial sectional View of the same.

Fig. 6 is a sectional view taken longitudinally of the machine of the first three mechanisms involved therein.

Fig. 7 is an enlarged perspectivevlew of the shaving knife and slot in the cushion feed.

Fig. 8 is a view of the material hopper and its operating mechanism.

Fig. 9 is an enlarged sectional view of a portion thereof. v Fig.V 10 is a front elevation of the compression plunger mechanism.

Fig. 11 is an end view of the same partly in section.

Fig. 12 is a detail cross sectional view of the compression plungers and their operating mechanisms on a ylarger scale.

Fig. 13 isa detail View of a portion of the mechanism for cleaning the compression plungers.

Figs. 14 and 15 are detail views of portions of the same mechanism.

Fig. 16 is a cross sectional view upon a large scalev of the buckets forthe liquid feed.

Fig. 17 is an elevation upon an enlarged Fig. 20 is a top plan view showing the o 3- erating cams for releasing plungers and li 'ter mechanisms.

Fig. 21 is an elevation of the lifter mechanism.

Figs. 22 and 23 are detail 'perspective views of portions of the same.

Fig. 24 is an elevation'of the releasing plunger mechanism.

Figs. 25 and 2G are two plan views upon -diderent sections of the same.

2"? is a View. partly in section of the i .n for driving the machine.

stop mechanlsm. y

Fig. 29 is a perspective view of the pallet with the finished brick thereon.

Fig. 30 is a perspective view of the pallet, and

Fig. 31 is a perspective view of a finished brick.

The fram-e.

described.

The convey/er mechanism. At the rear end of the machine and hav- Fig. 28 is a plan view of a portion of the ing bearings in the frame pieces B and B- is the shaft 1. A corresponding shaft (not shown) is at-the other end of the machine. Upon the shaft l are a pair of sprockets 2 and upon the corresponding shaft at the other end of the machine are corresponding sprockets. Over these sprockets run chains 3 which carry as alternate links thereof the pallet bed plates 4. These pallet bed plates are each provided upon either side with wheels 5 see Fig. 12 and carry therein adjacent either end, the upright pins 6, tapered at their lower ends and engaged in the tapered recess 7 in the pallet bed plates and fastened therein by nuts 8 engaging with the threaded end portions. By this construction the pins are firmly held in upright position. Each pin has a cut away portion 9 thereupon for a purpose hereinafter" to be described. Intermediate the pins is the pallet supporting portion of the pallet bed plate 4 comprising a smooth Hat platform l0 having thereupon suitable upright projections, (not shown) to engage in il-shaped notches 11 in the pallets 12, (see Fig. 30).l rThe pallets 12 are provided with raised portions 13 each surfaced to correspond with the surface itis desired to give the finished brick,- and corresponding exactly in size with one face of the brick. Mounted upon the pins 6 are mold sections 15 see Fig. 19 comprising end portions 16 having projecting 'therefrom the lugs 18 and 19 with recesses 20 therebetween, and 'the sides 21 into which are set the partitions 22 dividing each mold section into a piurality of molding chambers each adapted to accommodate a single brick. Upon 'the lower ing 19 of the molds is a m v a ,v 7 r. I a l y ple-te miese inner abats the face 

